AR Krause

E Terama

G Onori

I Vieitez

JA Boyne

JH Guo

JR Barnes

K Egashira

K Lum

K Mizuno

L Dougan

LR Pratt

M Patra

M Tan

MS Cheung

P Petong

PT Spicer

R Hoogenboom

RA Shaw

S Burikov

S Dixit

S Scheiner

SY Noskov

T Kurihara-Bergstrom

T Sudare

TS Van Erp

Y Zhong

Scientific Reports

AbstractThe infrared-active (IR) vibrational mode of ethanol (EtOH) associated with the asymmetrical stretching of the C-C-O bond in pico-liter volumes of EtOH-water binary mixtures is calorimetrically measured using photothermal microfluidic cantilever deflection spectroscopy (PMCDS). IR absorption by the confined liquid results in wavelength dependent cantilever deflections, thus providing a complementary response to IR absorption revealing a complex dipole moment dependence on mixture concentration. Solvent-induced blue shifts of the C-C-O asymmetric vibrational stretch for both anti and gauche conformers of EtOH were precisely monitored for EtOH concentrations ranging from 20–100% w/w. Variations in IR absorption peak maxima show an inverse dependence on induced EtOH dipole moment (μ) and is attributed to the complex clustering mechanism of EtOH-water mixtures.</jats:p

M. S. Ghoraishi

J. E. Hawk

Arindam Phani

M. F. Khan

T. Thundat

Crossref

Clustering mechanism of ethanol-water mixtures investigated with photothermal microfluidic cantilever deflection spectroscopy

Clustering mechanism of ethanol-water mixtures investigated with photothermal microfluidic cantilever deflection spectroscopy

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